#include <iostream>
#include <map>
#include <string>
using namespace std;
int main() {
  map<string, int> map1;
  map1["alpha"] = 1;
  map1["beta"] = 2;
  map1["gamma"] = 3;
  for (auto e : map1)
    cout << e.first << " : " << e.second << endl;
  map1.clear();
  cout << "Current size:" << map1.size() << endl;
  map1["a"] = 10;
  map1["b"] = 20;
  cout << "Current size:" << map1.size() << endl;
}
